Current of injury Physiology | ST segment depression and elevation in myocardial infarction

[@pankajkumaryadav1276]

Awesome ma'am, i was struggling with this topic for hours now and you explain it so beautifully and so easily !!

[@PhysiologyOpen]

Always the pleasure is mine. They say hard work pays off, mine paying off in way of teaching students who are adamant to learn

[@karthikreddy8567]

@@PhysiologyOpenplease make more on ecg basics/fundamentals

[@PhysiologyOpen]

Already full playlist on ECG fundamentals done

[@rinkyyadav9168]

There is not one video on this channel that I don't feel like commenting on and appreciating. Ma'am we are eternally grateful to you for sharing your immense knowledge with us and helping us on our journey to become great doctors! Thankyou so much ❤️❤️❤️

[@PhysiologyOpen]

So much 💓. I am thankful

[@matthewmickelson3402]

Thank you so much! I am a paramedic and a nurse, and I’m in nurse practitioner school. I had the question of why stemi looks the way it does. I had never heard of current of injury. I thank you so much for this explanation!

[@PhysiologyOpen]

Glad you understood the concept. Hope it helps in your skill

[@samrosthstein6385]

Really good video. I was lost trying to read Guytan on Current of Injury! Thank you so much

[@PhysiologyOpen]

Most welcome 😊

[@akhilraghavan1843]

Thank you madam for this explanation.

[@PhysiologyOpen]

My pleasure

[@malikshahabali1761]

extremely helpful video

[@PhysiologyOpen]

Glad to hear that

[@sukhdev9411]

You are the best mam ❤❤❤

[@PhysiologyOpen]

Thank you 😊❤️

[@bhuvaneshwariravichandran8202]

Madam.. @5.35 Why didn't you draw the St segment as a straight line from the S wave.. (A little bit elevation in it - between S wave and J point) Please explain And at 10.25 also there is a little bit elevation between S wave and J point in lead 2 but not in lead 3 it goes as a straight line from the S wave.. What makes it different? Please explain

[@PhysiologyOpen]

Will check the video at those points and get back by tomorrow

[@PhysiologyOpen]

Oh I think you got it wrong that from where to extend the line to determine original state of voltage in heart. Just extend the TP segment backwards straight. You will get it. With this I suggest watch the video once more

[@bhuvaneshwariravichandran8202]

Ok madam.. Thank you so much!

[@muhammadhuzaifa8649]

your lecture is great v well explained better than many others . mam i got a question at 4:25 you say there is a potential difference even at RMP but the ECG will record a straight line . why does the ECG record a straight line isn't it there is a potential difference between the injured point and normal point . why does the ecg not record any wave for this current ? i think there should be some changes in the PR segment at this point . isn't the ECG record the potential difference and make a wave on ECG paper according to its direction then why ECG not make any wave for this potential difference ?

[@LinN7300]

Thank you for the lecture! Is this a STEMI or a NSTEMI?

[@PhysiologyOpen]

ST elevation is seen in STEMI

[@achieverspoint.3610]

Bear in mind , current of injury always travel from more depolarised cells to less depolarised cells.

[@PhysiologyOpen]

Yup

[@khanbm9822]

Mam can you tell us some of the good KZbin lecturer for patho. like your

[@PhysiologyOpen]

Need to look into that

[@AliAli-lw1ei]

Thank u 🖤

[@PhysiologyOpen]

You are welcome

[@Hasan.x3]

thanks madam

[@PhysiologyOpen]

Most welcome

[@pallavibharadwaj3171]

Thank you MAM....

[@PhysiologyOpen]

Most welcome 😊

[@volgada]

Thanks a lot. Can you explain the mechanism of hyperacute tall t wave in acute myocardial infarction?

[@PhysiologyOpen]

I think this link may help: drsvenkatesan.com/2014/09/10/what-is-the-mechanism-of-tall-t-waves-in-hyperacute-mi/

[@sufyankhan7507]

Ma'am please tell how the physiology of each lead??

[@PhysiologyOpen]

kzbin.info/www/bejne/mKnSeHmvmrxghrc

[@PhysiologyOpen]

👆why each ecg records different ecg

[@sufyankhan7507]

Thank you ma'am as you replyed as earlier. I watched those video but as you suggested me .I watched carefully Thank you

[@PhysiologyOpen]

That’s the way to go

[@PhysiologyOpen]

Hope you understood well this time

[@avinashhumbe9781]

How the injured area is depolarised plz explain Bcz depolarisation is more positive inside but in injury there is leak of potassium then how it would be in depolarised state

[@PhysiologyOpen]

Injured area - even sodium and calcium ions enter the cells. In healthy myocardium, at rest it is impermeable to these ions

[@PhysiologyOpen]

Question: Can you tell how will the record be in V2 in case of posterior wall infarction ? Watch the video, think and answer

[@achieverspoint.3610]

In posterior mi there will b st depression in v2 becoz it is electrically Opposite lead

[@mohdyosri3622]

just reciprocal (mirror image to posterior leads) if STEMI shown in post. leads it will be as NSTEMI in V2 with tall R,,,, and unfortionetely its sometimes difficult to be differentiated from RVH and its strain pattern

[@AmitKumar-rz2en]

If at rest there is an existing voltage difference wouldn't it show as a deflection instead of a straight line

[@PhysiologyOpen]

Yes correct- deflection is actually the straight line above or below the isoelectric line…that’s why isoelectric line is ST segment and a line is drawn from deflected TP segment to determine elevation or depression

[@achieverspoint.3610]

Ist u have to learn the action potential of cardiac myocyte then u can learn it

[@PhysiologyOpen]

True...one can go through entire ECG playlist already created

[@tomcruise9317]

Is current and action potential same

[@PhysiologyOpen]

nope

[@tomcruise9317]

@@PhysiologyOpen then how ecg electrode can pick up voltage in heart

[@adnanshah1525]

Why is it that me or others don't understand what you are trying to explain here? Low voice & not good !

[@PhysiologyOpen]

Ok. Thanks for feedback. Probably it didn't turn out the way I wanted

[@drmetroyt]

Created all confusion , messed up all 👎 ...

[@PhysiologyOpen]

I think I need to remake this video…

[@drmetroyt]

@@PhysiologyOpen yes , please .. first explain normal than the pathophysiology in this video both are mixed now can't figure out which is normal and which is happening due cell damage

[@PhysiologyOpen]

@drmetroyt yeah ok thanks for advice. Actually I created a full playlist on ECG,..last was this…I guess I will make it as a standalone video as you suggest

[@Happy-yf8bc]

i love youu

[@PhysiologyOpen]

Aww...😘😊

[@meiringcollections8353]

Best

[@PhysiologyOpen]

Thanks

[@muhammadhuzaifa8649]

your lecture is great v well explained better than many others . mam i got a question at 4:25 you say there is a potential difference even at RMP but the ECG will record a straight line . why does the ECG record a straight line isn't it there is a potential difference between the injured point and normal point . why does the ecg not record any wave for this current ? i think there should be some changes in the PR segment at this point . isn't the ECG record the potential difference and make a wave on ECG paper according to its direction then why ECG not make any wave for this potential difference ?

[@PhysiologyOpen]

If there is any potential difference it will record a that potential which will be seen as a line. Wave is recorded when then there is continuous change in potential

[@PhysiologyOpen]

Obviously that line is not at zero , it will be either above zero or below zero potential..but we don’t know that until and unless we see that respect to ST segment

[@muhammadhuzaifa8649]

thank you mam i got it. in other words straight line doesn't,t mean zero potential it is called zero potential only at ST segment. so we have to compare the rest of waves and segment to it .

[@PhysiologyOpen]

Yup 👍